Your average Japanese woman isn't like the women in JAV. Sure, the ones you pick up at bars who are late 20s will screw your brains out but you don't want them as a wife. In fact if you do even a little research online you'll see that Japanese women in general are having less sex and less interest in it.
I don't know, sounds like a crock of shit to me. Girls go to bars for the same reason guys go to bars, to drink and get laid. That doesn't make them any less of a candidate for marriage or even a bad person, as a rule. Any man that thinks women don't like sex is confused. A woman may not want to have sex with you because it is more of a chore than enjoyment for her but that is partly on your head and partly on hers. I know guys that feel the same way about their wives (at times at least) and I was not immune to that when I was married myself. Keeping the "love alive" in a marriage is an art form not all can master but that is joint failing. I know some couples that still fuck like rabbits after 40 years at it, fucking amazes me.
I don't know any girls in the adult video industry but I have had a relationship with an exotic dancer and at another time with a prostitute (yeah, it was a wild ride but it was more fun than it sounds). Basically they are all the same and all a little different. I am sure some women in AV industry enjoy sex more than others but of course on film they get paid to "act" like they enjoy it, they get paid to perform for the camera, whether they feel like it or not. Dancers and whores have those same things in common with AV stars. That doesn't make them any less of a woman though. More actually, if anything, because pleasing men is their business and that is all about being a woman. Still, they all bitch when you leave the toilet seat up.
I can't see how it matters what country a person is from. A man is a man and a woman is a woman. The "sex drive" is a big part of who we are, it is wired into us. How we each deal with that...well that is another story altogether. From what I have read, Japan is suffering from a lack of large familes, not a lack of sex drive. That has nothing to do with whether a woman wants to fuck, it has to do with whether she wants to have and raise babies.